312
FNCA52 TJSJ 280851
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
451 AM AST WED JAN 28 2026
DISCUSSION
A VARIABLE WEATHER PATTERN WILL PERSIST ACROSS THE AREA, WITH
FLUCTUATIONS IN MOISTURE. HOWEVER, SOME BRIEF PERIODS OF LOWER
RELATIVE HUMIDITY ARE EXPECTED OVER USUAL AREAS, WITH VALUES
DROPPING INTO THE MID-50S. SURFACE WINDS ARE EASING UP, BUT STILL
SUSTAINED WINDS UP TO 15 MPH WITH HIGHER GUSTS ARE POSSIBLE
PARTICULARLY ACROSS THE SOUTHERN COASTAL PLAINS. DESPITE PERIODIC
INCREASES IN MOISTURE, FUELS REMAIN ON THE DRIER SIDE, SUPPORTING
FAVORABLE FIRE- WEATHER DISPERSION. FIRE- WEATHER CONDITIONS WILL
REMAIN LOW TO MODERATE TODAY.
PRZ014-290900-
SOUTHEAST COASTAL PLAINS-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 10
TEMP (24H TREND) 87 (+3) 67 (-1) 86
RH % (24H TREND) 54 (-10) 94 (+6) 53
WIND 20FT/EARLY(MPH) SE 12 G19 E 6 SE 9
WIND 20FT/LATE(MPH) SE 12 G19 E 6 SE 9
MIXING HGT(FT-AGL/MSL)4260 4000
TRANSPORT WND (MPH) E 10 SE 9
VENT RATE (KT-FT) 38340 32000
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-290900-
SOUTHERN HILLS-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 10
TEMP (24H TREND) 83 (+4) 64 (-2) 83
RH % (24H TREND) 59 (-11) 97 (+6) 58
WIND 20FT/EARLY(MPH) SE 11 E 5 SE 9
WIND 20FT/LATE(MPH) SE 11 E 5 SE 9
MIXING HGT(FT-AGL/MSL)4940 4460
TRANSPORT WND (MPH) E 10 SE 9
VENT RATE (KT-FT) 44460 35680
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-290900-
NORTH COASTAL PLAINS-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 50
TEMP (24H TREND) 85 (+1) 66 (-2) 86
RH % (24H TREND) 59 (-8) 100 (+5) 55
WIND 20FT/EARLY(MPH) E 13 SE 8 E 11
WIND 20FT/LATE(MPH) E 13 SE 8 E 11
MIXING HGT(FT-AGL/MSL)4340 3970
TRANSPORT WND (MPH) E 12 SE 6
VENT RATE (KT-FT) 43400 19850
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-290900-
NORTHERN HILLS-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 50
TEMP (24H TREND) 84 (+2) 64 (-1) 84
RH % (24H TREND) 56 (-12) 99 (+3) 55
WIND 20FT/EARLY(MPH) E 12 SE 5 NE 8
WIND 20FT/LATE(MPH) E 12 SE 5 NE 8
MIXING HGT(FT-AGL/MSL)5490 4160
TRANSPORT WND (MPH) E 8 SE 5
VENT RATE (KT-FT) 38430 16640
DISPERSION 5 5
DSI 5 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-290900-
WEST COAST-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 10
TEMP (24H TREND) 86 (+1) 66 (0) 86
RH % (24H TREND) 56 (-10) 98 (+1) 56
WIND 20FT/EARLY(MPH) E 10 NE 8 SE 10
WIND 20FT/LATE(MPH) E 10 NE 8 SE 10
MIXING HGT(FT-AGL/MSL)4280 4430
TRANSPORT WND (MPH) SE 6 SE 10
VENT RATE (KT-FT) 21400 39870
DISPERSION 5 5
DSI 6 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-290900-
EASTERN INTERIOR-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 20
TEMP (24H TREND) 83 (+2) 65 (-2) 84
RH % (24H TREND) 61 (-7) 99 (+6) 56
WIND 20FT/EARLY(MPH) E 11 E 8 SE 9
WIND 20FT/LATE(MPH) E 11 E 8 SE 9
MIXING HGT(FT-AGL/MSL)4450 4820
TRANSPORT WND (MPH) E 13 SE 7
VENT RATE (KT-FT) 48950 28920
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-290900-
LUQUILLO MOUNTAIN RANGE-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 10
TEMP (24H TREND) 79 (+2) 63 (-4) 79
RH % (24H TREND) 67 (-4) 100 (+4) 63
WIND 20FT/EARLY(MPH) E 10 E 5 SE 8
WIND 20FT/LATE(MPH) E 10 E 5 SE 8
MIXING HGT(FT-AGL/MSL)3790 3690
TRANSPORT WND (MPH) E 14 SE 7
VENT RATE (KT-FT) 45480 22140
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-290900-
CENTRAL MOUNTAIN RANGE-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30
TEMP (24H TREND) 82 (+4) 62 (-1) 82
RH % (24H TREND) 57 (-13) 99 (+3) 58
WIND 20FT/EARLY(MPH) SE 8 LGT/VAR SE 6
WIND 20FT/LATE(MPH) SE 8 LGT/VAR SE 6
MIXING HGT(FT-AGL/MSL)6510 4620
TRANSPORT WND (MPH) SE 7 SE 8
VENT RATE (KT-FT) 39060 32340
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-290900-
CAYEY MOUNTAIN RANGE-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 10
TEMP (24H TREND) 78 (+1) 64 (-2) 79
RH % (24H TREND) 68 (-6) 100 (+5) 61
WIND 20FT/EARLY(MPH) E 9 LGT/VAR SE 6
WIND 20FT/LATE(MPH) E 9 LGT/VAR SE 6
MIXING HGT(FT-AGL/MSL)3960 4170
TRANSPORT WND (MPH) E 14 SE 7
VENT RATE (KT-FT) 47520 25020
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-290900-
VIEQUES-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 10
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 55 (-2) 88 (+3) 53
WIND 20FT/EARLY(MPH) E 13 E 11 E 8
WIND 20FT/LATE(MPH) E 13 E 11 E 8
MIXING HGT(FT-AGL/MSL)3530 3240
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 45890 35640
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-290900-
CULEBRA-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 85 (0) 73 (-2) 85
RH % (24H TREND) 58 (-2) 84 (+2) 55
WIND 20FT/EARLY(MPH) E 12 E 11 E 8
WIND 20FT/LATE(MPH) E 12 E 11 E 8
MIXING HGT(FT-AGL/MSL)3420 3240
TRANSPORT WND (MPH) E 15 SE 8
VENT RATE (KT-FT) 44460 22680
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-290900-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 88 (+3) 67 (-2) 87
RH % (24H TREND) 53 (-8) 93 (+5) 53
WIND 20FT/EARLY(MPH) SE 12 G19 E 8 SE 11 G17
WIND 20FT/LATE(MPH) SE 12 G19 E 8 SE 11 G17
MIXING HGT(FT-AGL/MSL)4550 4310
TRANSPORT WND (MPH) SE 10 SE 10
VENT RATE (KT-FT) 40950 38790
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-290900-
SAINT THOMAS AND SAINT JOHN-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10
TEMP (24H TREND) 85 (+1) 71 (-4) 85
RH % (24H TREND) 55 (-5) 86 (+4) 52
WIND 20FT/EARLY(MPH) E 13 G17 E 12 E 9
WIND 20FT/LATE(MPH) E 13 G17 E 12 E 9
MIXING HGT(FT-AGL/MSL)3490 3240
TRANSPORT WND (MPH) E 17 SE 9
VENT RATE (KT-FT) 52350 25920
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-290900-
ST CROIX-
451 AM AST WED JAN 28 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20
TEMP (24H TREND) 86 (+1) 70 (-4) 86
RH % (24H TREND) 59 (-1) 88 (+1) 57
WIND 20FT/EARLY(MPH) E 13 E 11 E 8
WIND 20FT/LATE(MPH) E 13 E 11 E 8
MIXING HGT(FT-AGL/MSL)4480 4060
TRANSPORT WND (MPH) E 16 E 10
VENT RATE (KT-FT) 62720 36540
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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